Sealing devices for sterile packaging For 30 years, hawo has been one of the leading international manufacturers of sealing and welding equipment for doctors, hospitals, the fashion industry, dry cleaners and laundromats as well as industry. "Quality" and "innovation" are the core values of the hawo company philosophy and product development. That is why hawo has been certified in accordance with the new, process-oriented ISO 9001 : 2000 standard since 2003.